package com.atguigu.distributed.lock.leecode;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;

public class SpinLockDemo {
    AtomicReference<Thread> atomicReference = new AtomicReference<>();
    public void myLock(){
        Thread thread = Thread.currentThread();
        System.out.println(Thread.currentThread().getName()+"\t come in O(∩_∩)O");
        while (!atomicReference.compareAndSet(null, thread)){

        }
    }
    public void myUnlock(){
        Thread thread = Thread.currentThread();
        atomicReference.compareAndSet(thread, null);
        System.out.println(Thread.currentThread().getName()+"\t invoke myUnlock()");
    }
    public static void main(String[] args) {
        SpinLockDemo spinLockDemo = new SpinLockDemo();
        new Thread(()->{
            spinLockDemo.myLock();
            try{
                TimeUnit.SECONDS.sleep(5);
            }catch (Exception e){
                e.printStackTrace();
            }
            spinLockDemo.myUnlock();

        },"AA").start();
            try{
                TimeUnit.SECONDS.sleep(1);
             }catch (Exception e){
                e.printStackTrace();
             }
        new Thread(()->{
            spinLockDemo.myLock();
            try{
                TimeUnit.SECONDS.sleep(1);
            }catch (Exception e){
                e.printStackTrace();
            }
            spinLockDemo.myUnlock();

        },"BB").start();


    }
}
